qeth: layer 2 allow ethtool to set TSO

Allow ethtool to turn on/off EDDP via ethtool TSO interface.

Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

1 files changed, 17 insertions, 1 deletions

diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c
index ef07e9cadfc1..86ec50ddae13 100644
--- a/drivers/s390/net/qeth_l2_main.c
+++ b/drivers/s390/net/qeth_l2_main.c
@@ -849,6 +849,22 @@ static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
         return;
 }
 
+static int qeth_l2_ethtool_set_tso(struct net_device *dev, u32 data)
+{
+        struct qeth_card *card = netdev_priv(dev);
+
+        if (data) {
+                if (card->options.large_send == QETH_LARGE_SEND_NO) {
+                        card->options.large_send = QETH_LARGE_SEND_EDDP;
+                        dev->features |= NETIF_F_TSO;
+                }
+        } else {
+                dev->features &= ~NETIF_F_TSO;
+                card->options.large_send = QETH_LARGE_SEND_NO;
+        }
+        return 0;
+}
+
 static struct ethtool_ops qeth_l2_ethtool_ops = {
         .get_link = ethtool_op_get_link,
         .get_tx_csum = ethtool_op_get_tx_csum,
@@ -856,7 +872,7 @@ static struct ethtool_ops qeth_l2_ethtool_ops = {
         .get_sg = ethtool_op_get_sg,
         .set_sg = ethtool_op_set_sg,
         .get_tso = ethtool_op_get_tso,
-        .set_tso = ethtool_op_set_tso,
+        .set_tso = qeth_l2_ethtool_set_tso,
         .get_strings = qeth_core_get_strings,
         .get_ethtool_stats = qeth_core_get_ethtool_stats,
         .get_stats_count = qeth_core_get_stats_count,